CVE-2021-26342

Published: May 11, 2022Modified: Nov 21, 2024

3.3

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploitability: 1.8 / Impact: 1.4

Source: NVD

Description

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Affected (38)

Products: Amd: Epyc 7763 Firmware, Epyc 7713p Firmware, Epyc 7713 Firmware, Epyc 7663 Firmware, Epyc 7643 Firmware, Epyc 75f3 Firmware, Epyc 7543p Firmware, Epyc 7543 Firmware, Epyc 7513 Firmware, Epyc 7453 Firmware, Epyc 74f3 Firmware, Epyc 7443p Firmware, Epyc 7443 Firmware, Epyc 7413 Firmware, Epyc 73f3 Firmware, Epyc 7343 Firmware, Epyc 7313p Firmware, Epyc 7313 Firmware, Epyc 72f3 Firmware, Epyc 7773x Firmware, Epyc 7473x Firmware, Epyc 7573x Firmware, Epyc 7373x Firmware, Epyc 7001 Firmware, Epyc 7251 Firmware, Epyc 7261 Firmware, Epyc 7281 Firmware, Epyc 7301 Firmware, Epyc 7351 Firmware, Epyc 7351p Firmware, Epyc 7371 Firmware, Epyc 7401 Firmware, Epyc 7401p Firmware, Epyc 7451 Firmware, Epyc 7501 Firmware, Epyc 7551 Firmware, Epyc 7551p Firmware, Epyc 7601 Firmware

38 products

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7763 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7763	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7713p Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7713p	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7713 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7713	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7663 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7663	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7643 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7643	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 75f3 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 75f3	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7543p Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7543p	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7543 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7543	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7513 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7513	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7453 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7453	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 74f3 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 74f3	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7443p Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7443p	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7443 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7443	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7413 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7413	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 73f3 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 73f3	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7343 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7343	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7313p Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7313p	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7313 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7313	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 72f3 Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 72f3	All versions

Configuration T

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7773x Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7773x	All versions

Configuration U

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7473x Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7473x	All versions

Configuration V

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7573x Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7573x	All versions

Configuration W

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7373x Firmware	Before milanpi-sp3_1.0.0.7

Running on/with	Platform Versions
Amd Epyc 7373x	All versions

Configuration X

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7001 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7001	All versions

Configuration Y

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7251 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7251	All versions

Configuration Z

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7261 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7261	All versions

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7281 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7281	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7301 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7301	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7351 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7351	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7351p Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7351p	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7371 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7371	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7401 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7401	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7401p Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7401p	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7451 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7451	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7501 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7501	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7551 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7551	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7551p Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7551p	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Amd Epyc 7601 Firmware	Before naplespi-sp3_1.0.0.h

Running on/with	Platform Versions
Amd Epyc 7601	All versions

References (2)

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

Source: psirt@amd.com

Vendor Advisory

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.